Installed May 8, 2011. On my 07 BMW K1200GT It fit great and performed well until it instantly failed on November 15th after just 18 months. Appears one of the cells shut down. I took great care of it and even trickle charged it occasionally last winter. I didn't bother hassling with 2 year Warranty. The $20 credit wouldn't be worth the time. My original battery lasted 4 years.